Key takeaways
- Sandy, recessed or gapped mortar needs attention
- Interior damp spots can come from outside joints
- Repointing is cheaper than rebuilding
- Choose a mason who matches the mortar
What to look for outside
Mortar that is sandy, powdery or recessed deeper than about a quarter inch is wearing out. So are joints with visible gaps or cracks, and mortar that falls out when you scratch it with a key.
Loose bricks, bricks that rock when pushed and stair-step cracks along the joints also show that the mortar is failing.
What to look for inside
Damp spots, peeling paint, bubbling plaster and a musty smell near exterior brick walls can all mean that water is finding its way in through the joints.
Not every damp wall is caused by the mortar, but it is a common reason, and a close look outside usually helps sort it out.
What to do about it
Repointing replaces failed mortar before water causes bigger problems. It is far cheaper than rebuilding walls or replacing brick, and it often adds many years to a wall.
Get a mason to look at it, ask how the mortar will be matched and make sure the old mortar will be removed deeply enough.
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Quick answers
Can I fill the gaps in my mortar myself?
Small repairs are possible, but a good job needs the old mortar cut out to a proper depth, a matching mix and tooling. A poor patch can look worse and fall out.
How long does repointed brick last?
Well-done repointing can last many decades. The mortar mix, the depth of the work and the care taken with the joints matter most.
Ready to talk it through? Get a free estimate or call 615-431-3789.